Victoria's long distance rail fleet would be replaced under $632m Liberal pledge

Victoria's problem plagued long distance rail fleet would be completely replaced under a multi-million dollar pledge by state Liberal leader Matthew Guy.

The Coalition is promising to spend $632.9 million on 96 new "next generation" VLocity railcars, which would operate as 16 six-carriage trains on Victoria's long distance lines, if it wins November's state election.

The new trains would be built at Bombardier's Dandenong factory, and would feature first and second class seating, as well as buffet facilities.

Matthew Guy has pledged to replace Victoria's long distance rail fleet if the Liberals win the state election. (9NEWS) ()

Mr Guy said the announcement would be the first of many; promising regional rail passengers a "new deal".

"First class, economy class, buffet class, as it is now, but on new VLocity trains, faster, more efficent, more reliable more comfortable", he said.

The trains would operate services to Albury, Shepparton, Swan Hill, Echuca, Warrnambool and Bairnsdale, with the current fleet of 1980s-era N class locomotives and Z class carriages expected to be phased out by 2022.

"Maintenance issues, no air-conditioning, but it's more the lateness. The train is always late," she said.

The new trains would be built in Dandenong. (9NEWS) ()

VLocity railcars have been operating short haul inter-city services for more than a decade, and have proved highly popular with passengers.

The Coalition says it will fund a new maintenance facility to ensure the long-distance trains run reliably.

The opposition announcement pre-empts what is expected to be a big spending May budget from the Andrews government, which has banked a sizeable war chest from the lease of the Port of Melbourne and sale of Victoria's share of Snowy Hydro.